Which pricing innovation, based on mathematical modeling, revolutionized how advanced mathematics software is sold to universities and researchers?

In the field of mathematics education and learning tools, pricing strategies have evolved significantly over time. From textbooks to digital platforms, companies have employed various mathematical models to optimize their pricing. This trivia tests your knowledge about an innovative pricing strategy that revolutionized how mathematical software is sold to educational institutions and individual learners. Do you know which pioneering approach created a paradigm shift in the mathematics education market?

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The 'Golden Ratio Pricing' model where software costs are calculated using the Fibonacci sequence based on institution size
The 'Network Effect Multiplier' where prices decrease proportionally as more users within an institution adopt the software
The 'Differential Equation Pricing' where costs are determined by solving an equation based on the institution's research output
The 'Probabilistic Discount System' where final prices are determined through a randomized algorithm based on past purchases